The root cause for lack of unity among Muslims is the lack of patience. Muslims make a huge hue and cry about every occasion of difference among them. The conquest of Iran was a very important event in Muslim history. The Iranians were very powerful compared to the Muslims. The battle at Qadsiya was very crucial in this conquest. The Muslim commander in this battle was Sad ibn Abi Waqqas. During battle he sat on top of an abandoned fort. He did not directly participate in the war, but only observed the Muslim army fighting in front of him. This led to many complaints among the Muslims who took part in the battle. One of the Muslims said that the wives of many of the Muslim fighters were widowed as their husbands died fighting, but Sad’s wife did not become a widow. This shows the deep complaint Muslims at Qadsiya had developed with regard to their commander Sad. In spite of this complaint, the Muslims fought very valiantly and defeated the powerful Iranian army. Sad had kept it secret that he had been suffering from an illness which had prevented his movement. This is why he sat atop the fort and did not participate in battle. The Muslims fought with unity in spite of the misgivings they had developed for Sad, although this misgiving was unfounded because Sad had a justified reason for what he did. Unity comes when people in a group can tolerate differences. The only condition for unity is patience. If there is no patience in members of a group, there can be no unity. Without unity, a group is utterly powerless.

The Quran says: “With every hardship there is ease.” (94:5) This means that in this world it is not possible for a person to only have happy and pleasant circumstances. When God Himself has made roses with thorns, how can you wish to have a rose plant which has no thorns? The law of nature in this world is that difficulties and problems will always exist alongside happiness and joy. One cannot be detached from the other. Just as we cannot detach thorns from a rose plant, similarly we cannot detach unpleasant circumstances from situations of joy. No person can enjoy a life of absolute comfort such that he is completely devoid of sorrow.
Maulana Wahiduddin Khan